Garage Door Springs in Millbrae: Torsion vs. Extension (Which Do You Have?)
2026-08-02 7 min read
If you've ever dealt with a stuck garage door, you know how frustrating it can be. Most homeowners don't realize their garage door springs come in two completely different types, and knowing which one you have can save you hundreds on repair costs. Your door uses either torsion or extension springs, and they behave very differently when something goes wrong. This guide will help you identify yours and understand what you're actually paying for.
Understanding Your Spring Type
Your garage door weighs between 300 and 500 pounds. Those springs counterbalance that weight so your opener doesn't burn out in six months. The two main spring types work on opposite mechanical principles.
Torsion springs mount horizontally above your garage door opening. They twist (torque) to lift the door. Think of them like a wound-up clock spring. When they fail, the door typically won't open at all. Extension springs run along the sides of your door tracks. They stretch like a rubber band to provide lift. A snapped extension spring usually means your door hangs unevenly or becomes very hard to open.
Torsion springs last 7 to 9 years with typical residential use. Extension springs often fail sooner, sometimes within 5 to 7 years, because they endure more repetitive stress. Both types will eventually fail, and both require professional replacement for safety reasons.
Why Spring Type Matters for Your Cost
Here's where knowing your setup actually saves money. Torsion spring replacement typically costs $150 to $300 per spring in the Millbrae area. Extension springs usually run $100 to $200 each. Most garage doors have either one torsion spring or two extension springs. But pricing isn't just about the spring itself, it's about the labor involved and what's already broken.
If your torsion spring snaps, the entire system fails immediately. Your door becomes a dead weight. You'll need same-day service, which our team can handle, but you also can't delay. Extension spring failure sometimes feels less urgent because the door still moves, just poorly. That's a trap. A failing extension spring puts extra strain on the remaining spring and your opener.
**Need garage door springs in Millbrae today?** Call (510) 738-2914. we cover same-day service across the area.
Diagnosing What You Have
Look at your garage door from inside the garage with the door closed. Do you see a metal shaft running horizontally above the door, with one or two large coils wrapped around it? That's a torsion spring setup. Do you see two springs running vertically along the top of each side track? Those are extension springs.
If you're unsure, don't guess. A misdiagnosis could mean ordering the wrong part or attempting a repair that doesn't match your actual problem. We recommend getting a free estimate so a technician can confirm your setup. Understanding whether you have a torsion or extension configuration also helps you recognize early warning signs. Torsion springs announce failure with loud banging noises. Extension springs typically squeak or make grinding sounds before they snap.
For more detail on repair versus replacement decisions, check out our guide to when to repair versus replace garage door springs.
When DIY Inspection Isn't Enough
Some homeowners try to save money by inspecting springs themselves. We get it. But garage door springs are under extreme tension. A torsion spring can unwind with enough force to cause serious injury. Extension springs can snap and whip around. If you suspect a spring problem, use visual inspection only from a safe distance, then schedule a free quote for professional diagnosis.
The cost difference between identifying your spring type upfront and guessing wrong is significant. A wrong diagnosis means a second service call, which doubles your labor charges. In the San Francisco Bay Area, where Millbrae sits, same-day emergency service comes at a premium. Getting it right the first time keeps your costs reasonable.
Regional Spring Challenges in Millbrae
Millbrae's coastal climate actually stresses garage door springs more than inland areas. Salt air and humidity accelerate corrosion, which weakens springs faster. Springs that would last 8 years inland might only last 6 in Millbrae. That's another reason knowing your spring type matters. Torsion springs in our area should be inspected every 2 years after the 5-year mark. Extension springs need even more frequent attention.
Learn more about how Millbrae's climate uniquely affects garage doors in our article on why coastal conditions are tough on your system.
What to Expect When You Call
When you contact Garage Door Company Millbrae for spring service, a technician will arrive and immediately identify your spring type. They'll assess whether the spring can be repaired or needs full replacement, then provide a transparent estimate. Most spring jobs are completed the same day. We'll also check your opener, tracks, and rollers while we're there, because spring failure often reveals other wear you can address proactively rather than reactively.
Don't wait for a complete failure. A preventive inspection costs far less than an emergency call when you're locked out of your garage. Get a same-day estimate today or call (510) 738-2914 to discuss your spring setup with our team.
Frequently Asked Questions
How do I know if my garage door spring is about to fail? Listen for loud banging or popping sounds, especially when opening or closing. You might also notice the door moving slower than normal or feeling heavier. Visible gaps or unevenness in the door's position indicate spring trouble. Don't ignore these signs.
Can I replace a garage door spring myself? No. Springs operate under extreme tension (up to 200 pounds of force). Mishandling them risks serious injury or death. Always hire a licensed professional for spring replacement work.
How much does a torsion spring cost versus an extension spring? Torsion springs typically run $150 to $300 per spring with labor included. Extension springs cost $100 to $200 each. Total cost depends on your setup and whether additional repairs are needed during service.
How often do garage door springs need replacement? Torsion springs last 7 to 9 years with typical use. Extension springs usually last 5 to 7 years. Millbrae's coastal climate may shorten these timelines due to corrosion and salt air exposure.
What's the difference between a snapped spring and a worn spring? A snapped spring breaks suddenly and stops working immediately. A worn spring still functions but shows signs of stress like noise, slowness, or uneven door movement. Both need professional attention, but a snap is usually more urgent.